gimp/app/gui/session.c

/* The GIMP -- an image manipulation program
 * Copyright (C) 1995 Spencer Kimball and Peter Mattis
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */


/* Session-managment stuff   Copyright (C) 1998 Sven Neumann <sven@gimp.org>

   I include a short description here on what is done and what problems 
   are left:

   Since everything saved in sessionrc changes often (with each session?) 
   the whole file is rewritten each time the gimp exits. I don't see any
   use in implementing a more flexible scheme like it is used for gimprc.

   Right now session-managment is limited to window geometry. Restoring 
   openend images is planned, but I'm still not sure how to deal with dirty
   images.

   There is a problem with the offset introduced by the window-manager adding
   decorations to the windows. This is annoying and should be fixed somehow.
   ( Update: I was promised that this will be fixed in gtk. )
   
   Dialogs are now reopened if the gimp is called with the command-line-option
   --restore-session or if the related entry is set in gimprc.
   Probably there should alternatively be a list of dialogs in the preferences 
   that should always be opened on start-up. 

   Please point me into the right direction to make this work with Gnome-SM.
 */

#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>

#include "appenv.h"
#include "commands.h"
#include "gimprc.h"
#include "session.h"

static void sessionrc_write_info (SessionInfo *, FILE *);
static void session_open_dialog (SessionInfo *info);
static void session_reset_open_state (SessionInfo *info);

GList *session_info_updates = NULL;

/* global session variables */
SessionInfo toolbox_session_info = 
  { "toolbox", NULL, 0, 0, 0, 0, FALSE };
SessionInfo lc_dialog_session_info = 
  { "lc-dialog", dialogs_lc_cmd_callback, 0, 400, 0, 0, FALSE };
SessionInfo info_dialog_session_info = 
  { "info-dialog", NULL, 165, 0, 0, 0, FALSE };
SessionInfo tool_options_session_info = 
  { "tool-options", dialogs_tools_options_cmd_callback, 0, 345, 0, 0, FALSE };
SessionInfo palette_session_info = 
  { "palette", dialogs_palette_cmd_callback, 140, 180, 0, 0, FALSE };
SessionInfo brush_select_session_info = 
  { "brush-select",  dialogs_brushes_cmd_callback, 150, 180, 0, 0, FALSE };
SessionInfo pattern_select_session_info = 
  { "pattern-select", dialogs_patterns_cmd_callback, 160, 180, 0, 0, FALSE };
SessionInfo gradient_editor_session_info = 
  { "gradient-editor", dialogs_gradient_editor_cmd_callback, 170, 180, 0, 0, FALSE };

/* public functions */
void 
session_get_window_info (GtkWidget   *window, 
			 SessionInfo *info)
{
  if ( !save_session_info || info == NULL || window->window == NULL )
    return;

  gdk_window_get_origin (window->window, &info->x, &info->y);
  gdk_window_get_size (window->window, &info->width, &info->height);

  /* This is a very ugly hack to work against the offset 
     introduced by window decorations.
     The problem should be handled in gtk ... */
  info->y += -20;

  if ( we_are_exiting )
    info->open = GTK_WIDGET_VISIBLE (window);

  if ( g_list_find (session_info_updates, info) == NULL )
    session_info_updates = g_list_append (session_info_updates, info);
}

void 
session_set_window_geometry (GtkWidget   *window, 
			     SessionInfo *info,
			     int          set_size)
{
  if ( window == NULL || info == NULL)
    return;
  
  gtk_widget_set_uposition (window, info->x, info->y);
  
  /* It seems that usizing the dialogs is a bad thing, because you can't
     make them smaller then. Until a better solution is found, we don't set
     the size ... 
  */
  set_size = FALSE;

  if ( (set_size) && (info->width > 0) && (info->height > 0) )
    gtk_widget_set_usize (window, info->width, info->height);
}

void
save_sessionrc (void)
{
  char *gimp_dir;
  char filename[512];
  FILE *fp;

  gimp_dir = gimp_directory ();
  if ('\000' != gimp_dir[0])
    {
      sprintf (filename, "%s/sessionrc", gimp_dir);

      fp = fopen (filename, "w");
      if (!fp)
	return;

      fprintf(fp, "# GIMP sessionrc\n");
      fprintf(fp, "# This file takes session-specific info (that is info,\n");
      fprintf(fp, "# you want to keep between two gimp-sessions). You are\n");
      fprintf(fp, "# not supposed to edit it manually, but of course you\n");
      fprintf(fp, "# can do. This file will be entirely rewritten every time\n"); 
      fprintf(fp, "# you quit the gimp. If this file isn't found, defaults\n");
      fprintf(fp, "# are used.\n\n");

      /* save window geometries */
      g_list_foreach (session_info_updates, (GFunc)sessionrc_write_info, fp);

      /* save last tip shown */
      fprintf(fp, "(last-tip-shown %d)\n\n", last_tip + 1);

      fclose (fp);
    }
}

void
session_init (void)
{
  char *gimp_dir;
  char filename[512];

  gimp_dir = gimp_directory ();

  if (gimp_dir)
    {
      sprintf (filename, "%s/sessionrc", gimp_dir);
      parse_gimprc_file (filename);
    }
}

void
session_restore (void)
{      
  /* open dialogs */
  if (restore_session)
    g_list_foreach (session_info_updates, (GFunc)session_open_dialog, NULL);

  /* reset the open state in the session_infos */
  g_list_foreach (session_info_updates, (GFunc)session_reset_open_state, NULL);
}

/* internal function */
static void
sessionrc_write_info (SessionInfo *info, FILE *fp)
{
  if (fp == NULL || info == NULL) 
    return;
  
  fprintf (fp,"(session-info \"%s\"\n", info->name);
  fprintf (fp,"   (position %d %d)\n", info->x, info->y);
  fprintf (fp,"   (size %d %d)", info->width, info->height);
  if ( info->open ) 
    fprintf (fp,"\n   (open-on-exit)");
  fprintf (fp,")\n\n"); 
}

static void
session_open_dialog (SessionInfo *info)
{
  if (info == NULL || info->open == FALSE) 
    return;

  (info->open_callback) (NULL, NULL);
}

static void
session_reset_open_state (SessionInfo *info)
{
  if (info == NULL ) 
    return;

  info->open = FALSE;
}